Chill for metallurgic furnaces



(No Model.)

J. MORRISON.

CHILL FOB METALLURGIG FURNACES.

Patented June 26, 1888.

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UNITED STATES PATENT OFFICE.

JOHN MORRISON, OF PITTSBURG, PENNSYLVANIA.

CHILL FOR METALLURGIC FUR NACES.

SPECIFICATION forming part of Letters Patent No. 279,970, dated. June26, 1883.

Application filed December 22, 1882.

To all whom/it may concern:

Be it known that I, JOHN MoRRIsoN, of Pittsburg, in the county, ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Chills for Metallurgic Furnaces; and I do hereby declarethe following to be a full, clear, and exact description thereof.

My invention relates to the chills employed in puddling, and similarmetallurgic furnaces for cooling the brick-work at the fire-bridge,neck, and sides of the furnace, to prevent its rapid burning out. Inthese furnaces the intense heat generated rapidly burns out these partsof the furnace unless they are in some manner cooled, and to cool theseparts it has been customary to put cast-iron boxes, commonly termedchills, 7 in the fire-bridge, neck, and sides of the furnace, thesechills being surrounded by fire-brick, clay, or fix, and'water beingcarried through, or the chills being open to the passage of air, sothatithe parts of the furnace are cooled to prevent their rapid burningout or wasting way under the heat of the furnace. It has been found thatthe cast-iron thills were very liable to warp and crack under thechanges of temperature of the ing or bore is closed by slag theaircanstill pass or circulate through the chill and the v chill still act tocool the walls of the furnace.

To enable others skilled in the art to make and use my invention, I willdescribe the same more fully, referring for that purpose to theaccompanying drawings, in which Figure 1 is a longitudinal centralsection of a .puddlingfurnace provided with my improved chills. Fig. 2is a horizontal section ofthe same on the line a: m, Fig. 1. Fig. 3 is(No model.)

a cross-section of the same on the line y y, Fig. 2. Fig. 4 is aperspective view of the improved chill, and Fig. 5 is alike view of thechill employed on either side of the door.

Like letters of reference indicate like parts in each.

In the drawings, A represents the fire-chamber, 13, the furnace-chamber,and (l the stack, of a puddling or other furnace; and (l is thefirebridge, 6 the neck, and f the door, of the same. The bed-plateg issupported on the walls 1 and on it are supported my improved chills 71.These chills h are preferably formed of firebrick, tiles being molded tothe desired shape of a clay having little shrinkage under changes oftemperature, and baked in a suitable kiln. Any other suitable refractory111aterial-such as aluminous clays, silica, and like materials may alsobe employed for the formation of these tiles. The chill h has the boreor hole 2' extending longitudinally through it about centrally of thechill, so as to leave sufficiently thick walls to resist the thrust orblows of the workmens tools in case the chill is uncov cred. Along oneside of the chill is the groove 7.", which is preferably formed curved,so as to weaken the chill as little as possible, but which may beangular or anyother shape desired, its purpose being to provide anauxiliary passage for the circulation of air, which. will act to coolthe walls in case the bore i is closed. The auxiliary passage thusformed is connected with the bore i by means of a series of holes oropenings, 7, at suitable distances apart in the chill.

I The chills or tiles are made in suitable lengths, according to thesize of the furnace and position of the chills therein. The size foundbest adapted for the usual piuldling-furnace is a chill or tile aboutthree feet long, seven and one-half inches square, and having the bore ithree inches in diameter, groove 7. one inch deep, and openingsl aboutsix inches onetile is ordinarily of suffi cicnt length to form thesechills. The chill along the side of the furnace-chamber opposite thedoor is formed of two of these tiles, and is preferably built in I CC)so that the groove is is at the side of the chill opposite thefurnaee-bed, as shown in Figs. 2 and 3, as when so placed the passagesof the tile will communicate more easily with the openings 0, made inthe side plate 1) of the furnace for the entrance of air to the chills.The ehills'on either side of the furnace-door are made of triangulartiles m, and have only the groove Jr, the base of the groove beingsubtially parallel with the outer or wearing face of the tile, andtapering oil at the narrow end of the tile, and the tile being providedwith a series of recesses, at, extending from the groove into the bodyof the tile, to allow the circula tion of air into the body of thechill. They are built in with the groove 7tagainst the side of thefurnace-plates, and, as they are not so liable to the blows of theopcratorstools, will be found to last as long as the regular chills,even though provided witlrthe recesses a. The

.passages, bores, and grooves in the chills communicate with theopenings in the furnaceplates 1), so that there is a free circulationthrough all the walls of the furnace-chamber. The chills are builtaround with fire-brick in the same manner as the ordinary cast-ironchills, and are protected by this brick-work and the fix or lining ofthe furnace-chamber.

It is found that these chills last much longer than the ordinarycastiron chills, and they are not so liable to warp or break under thevariations of temperature in the furnace-chamber. It is also found thatthese chills are not so liable to melt out under the intense heat of thefurnace when exposed on account of the melting away of the fire-brick orfix-covering. There the chill does crack or wear through and the mainpassage is closed by the slag, which runs through the opening formed andsets and cools in the main passage i of the chill, thus closing it, theusefulness of the chill is not materially affected, as the air can thenpass through the openings 70 into the auxiliary pas sage Z and back intothe main passage beyond the obstruction, the circulation of air stillcontinuing in the chill. The chills can also be manufactured much morecheaply than the ordinary east-iron chills, and for this reason can bereplaced at much less cost in case of burning out. 1

I am aware that in various classes of furnaces hollow side walls havebeen formed for heating air-blasts, and also that hollow per foratedtuyere blocks have been used for de livering a blast of air to the fireof furnaces and to the molten metal in the furnace, as in the pneumaticprocess, and do not herein claim such subjeet-1natter.

lVhat I claim as my invention, and desire to obtain by Letters Patent,is

1. A chill for metallurgic furnaces, having a main passage, a groovealong one face to form an auxiliary passage, and openings between saidpassage and groove, as and for the purposes set forth.

2. A chill for metallurgic furnaces, having a groove extendinglongitudinally along one side and recesses or openings at the bottom ofsaid groove, substantially as set forth.

In testimony whereof I, the said .TouN Mon- RISON, have hereunto set myhand.

JOHN MORRISON.

\Vi tn csses:

M. 1. CANFIELD, JAMES I. KAY.

